Lithographic printing inks

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 11/02 (2006.01) C09D 11/10 (2006.01)

Patent

CA 2455041

A single fluid lithographic printing ink composition includes a hydrophobic phase and a hydrophilic fluid phase. The hydrophilic fluid phase contains water or a liquid polyol or both. The hydrophobic phase contains a hydrogen bonding vinyl polymer that can hydrogen bond with the hydrophilic fluid phase. The vinyl polymers are preferably branched, but remain soluble in the hydrophobic phase. The invention provides stable inks that can be used as single fluid inks wiht excellent fountain stability and resistance to toning.

L'invention concerne une composition d'encre d'impression lithographique fluide, pouvant être utilisée seule, comprenant une phase hydrophobe et une phase fluide hydrophile. La phase fluide hydrophile contient de l'eau ou un polyol liquide ou les deux. La phase hydrophobe contient un polymère vinyle à liaison hydrogène qui peut réaliser des liaisons hydrogène avec la phase fluide hydrophile. Les polymères vinyliques sont de préférence ramifiés, mais restent solubles dans la phase hydrophobe. L'invention permet d'obtenir des encres stables qui peuvent être utilisées, seules, comme encres fluides avec une très bonne stabilité en réservoir et une très bonne résistance au changement de couleur.

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